Siemens Acuson S2000 - Virtual Touch Quantification; Clinical Measurements: Range and Accuracy; Virtual Touch IQ

Appendix A Technical Description
A - 36 Instructions for Use
Virtual Touch Quantification
Clinical Measurements: Range and Accuracy
Direct Measurement
Range
Tolerance
Symbol
Tolerance Function or Value (Accuracy)
Shear Velocity (Vs) 0.8 – 3.65 m/s Tol(Vs) (Applies to the 4C1, 4V1, and 6C1 HD transducers)
±20% of the velocity over the depth range of
0.5 - 8.0 cm
3.65 – 5.0 m/s Tol(Vs) (Applies to the 4C1, 4V1, and 6C1 HD transducers)
±30% of the velocity over the depth range of
3.0 - 6.0 cm
Shear Velocity (Vs) 0.8 – 6.1 m/s Tol(Vs) (Applies to the 9L4 transducer)
±20% of the velocity over the depth range of
0.5 - 4.0 cm
6.1 – 8.4 m/s Tol(Vs) (Applies to the 9L4 transducer)
±40% of the velocity over the depth range of
0.5 - 2.0 cm
Elasticity (E) 1.9 – 40.0 kPa Tol(E) (Applies to the 4C1, 4V1, and 6C1 HD transducers)
±20% of the elasticity over the depth range of
0.5 - 8.0 cm
40.0 – 75.0 kPa Tol(E) (Applies to the 4C1, 4V1, and 6C1 HD transducers)
±30% of the elasticity over the depth range of
3.0 - 6.0 cm
Elasticity (E) 1.9 – 111.6 kPa Tol(E) (Applies to the 9L4 transducer)
±20% of the elasticity over the depth range of
0.5 - 4.0 cm
111.6 – 211.7 kPa Tol(E) (Applies to the 9L4 transducer)
±40% of the elasticity over the depth range of
0.5 - 2.0 cm
Virtual Touch IQ
Clinical Measurements: Range and Accuracy
Direct Measurement
Range
Tolerance
Symbol
Tolerance Function or Value (Accuracy)
Shear Velocity (Vs) 0.5 – 10.0 m/s Tol(Vs)
±20% of the velocity over the range of 0.5 – 10.0 m/s
Elasticity (E) 0.8 – 300.0 kPa Tol(E)
±20% of the elasticity over the range of 0.8 –
300.0 kPa